613results about How to "Reduce emission concentration" patented technology

The invention discloses a low temperature Claus sulfur recovery process. The process mainly comprises a thermal reaction section, a catalytic reaction section and a tail gas incineration section, wherein in a combustion furnace of the thermal reaction section, partial hydrogen sulfide reacts with oxygen to be converted into sulfur dioxide, the hydrogen sulfide and the sulfur dioxide undergo a Claus reaction to generate sulfur, and process gas after sulfur separation enters the catalytic reaction section; in the reactor of each stage of the catalytic reaction section, the hydrogen sulfide and the sulfur dioxide under conventional Claus reaction, catalyst reactivation, sub-dewpoint and sub-solid point low temperature Claus reaction in sequence; after the catalyst reaction section, the tail gas which is subjected to sulfur separation enters the tail gas incineration section, and the tail gas is incinerated and exhausted in the tail gas incineration furnace. The process adopts a lower reaction temperature, contributes to performance of chemical equilibrium towards the direction of sulfur generation, so that conversion rate and recovery rate of sulfur are improved. Moreover, the process has the advantages of simple process flow, relative small equipment and investment, low operation cost and more contribution to environmental protection. The invention also discloses a device for the low temperature Claus sulfur recovery process.

The invention relates to a VOCs (Volatile Organic Compounds) high-efficiency processing method. In the method, dust removal processing, odor removal processing and tail gas processing are carried out on waste gas. Firstly, a bag-type dust collector is adopted to carry out preprocessing on the waste gas, parts of materials are recovered and then an electrostatic dust collector is introduced to further recovery the materials; then the waste gas is subjected to low-temperature catalytic oxidation processing; the waste gas is subjected to adsorption processing. According to the invention, the petrochemical industrial organic waste gas is processed by utilizing the combination of catalytic oxidation and adsorption processes, so that the materials can be well recovered, odor of the organic waste gas is eliminated and the problem of emission of petrochemical industrial tail gas is solved. The method disclosed by the invention has a good purifying effect and low consumption and is low in engineering cost; the materials can be recovered; flue gas emission concentration is lower than the emission standard by over 30 percent; the VOCs high-efficiency processing method has obvious economic benefits and social benefits and can be used for processing the petrochemical industrial organic waste gas with high concentration, high flow and complex ingredients.

The invention provides equipment and a method for treating nondegradable wastewater by utilizing catalytic oxidation of ozone. The equipment comprises a feeding system, an ozone catalytic reaction tower and a spray absorbing tower; the feeding system comprises a wastewater pH regulation device, a wastewater feeding pipeline, a hydrogen peroxide aqueous solution feeding pipeline, an ozone feeding pipeline and a pH regulator feeding pipeline; the wastewater pH regulation device is communicated with the wastewater feeding pipeline and the pH regulator feeding pipeline respectively; the ozone feeding pipeline is communicated with the wastewater feeding pipeline; the ozone catalytic reaction tower is communicated with the wastewater feeding pipeline and the hydrogen peroxide aqueous solution feeding pipeline respectively so that wastewater undergoes once catalytic reaction in the presence of a first catalyst to generate a liquid flow and an ozone tail gas flow which are subjected to initial treatment; and the spray absorbing tower is communicated with a catalytic reaction system, is used for spraying at least one part of the liquid flow which is subjected to the initial treatment, and is contacted with the ozone tail gas flow in the presence of a second catalyst to undergo second catalytic reaction.

The invention discloses a process for treating mine wastewater containing sulfur minerals, As, Pb and Cd, which comprises the following steps: (1) performing blast aeration and oxidation treatment on the mine wastewater containing the sulfur minerals, As, Pb and Cd in an aeration tank; (2) neutralizing and coagulating the wastewater after the aeration and oxidation in a neutralization tank and controlling the pH to be between 8.6 and 9.5; (3) standing and depositing the wastewater after the neutralization and the coagulation treatment in a sedimentation tank; and (4) after the wastewater is clear after standing for a certain period of time, performing advanced treatment on heavy metal in a supernatant in a physical and chemical adsorption device and an activated carbon filtering system to obtain clean water meeting the environmental-protection or agricultural requirement. Through the process, peculiar smell in the mine wastewater can be eliminated, the wastewater color is changed to be normal, and the requirement of the quality of mine wastewater containing the discharged sulfur minerals, As, Pb and Cd in 'Standards for irrigation water quality' (GB5084-2005) can be met.

The invention discloses a wet-type electric precipitator and an electric precipitation desulfurization device comprising the same. The wet-type electric precipitator comprises anode plates, cathode rays, two cathode ray suspension frames, an insulator chamber and a cleaning water pipe, wherein multiple bending plates which extend along the vertical direction and are arranged in parallel are used as the anode plates; the multiple cathode rays are suspended between two adjacent bending plates and are bent in tendency the same as that of the bending plates; multiple barbs are fixed on each cathode ray at intervals; the two cathode ray suspension frames are respectively positioned above and below the anode plates and are used for fixing the top ends and bottom ends of the cathode rays; the insulator chamber is used for fixing the ends of the two cathode ray suspension frames; and the cleaning water pipe is arranged above the anode plates. The wet-type electric precipitator disclosed by the invention is used in the desulfurization device, is arranged between two-stage demisting layers in a desulfurization tower and is used for performing fine dust removal on flue gas subjected to primary demisting.

The invention belongs to the field of coal layer combustion boiler pollutant discharge control and discloses a layer combustion boiler combination denitration device and method. The invention aims to enable NOx discharged by layer combustion boilers to reach the standard. A vaporizing chamber is arranged below the front arch in a hearth, and the partition of the hearth is provided with a gas outlet. A vaporization air chamber, a first air chamber, a second air chamber, a third air chamber, a fourth air chamber and a fifth air chamber are sequentially formed below a fire grate from front to back. A secondary air port is formed in the part, above the front arch, of the front wall of the hearth. The outlet of the hearth is communicated with the inlet of a horizontal type cyclone separator with an acceleration section, and the bottom of the horizontal type cyclone separator with the acceleration section is communicated with a main combustion zone of the lower part of the hearth through a return valve. The horizontal type cyclone separator with the acceleration section is sequentially communicated with a convection calandria, an economizer and an air pre-heating device, the air pre-heating device is communicated with a dust remover, the dust remover is communicated with a recycling fan and a draught fan, and the recycling fan is communicated with a smoke channel. An air supply fan is communicated with the vaporization air chamber, the first air chamber, the second air chamber, the third air chamber, the fourth air chamber, the fifth air chamber and the secondary air port. The layer combustion boiler combination denitration device and method are used for layer combustion boiler combination denitration.

The invention discloses a solid waste innocent treatment device and a solid waste innocent treatment method. The solid waste innocent treatment device comprises a solid waste pyrolysis gasifier, a fuel gas oxygen replenishment premixing and filtering chamber, a fuel gas combustion chamber, a dechloridation and desulfurization drying device and a solid waste pretreatment device which are sequentially communicated; the solid waste innocent treatment device also comprises a biomass pyrolysis gasifier and a tail gas treatment device, wherein the biomass pyrolysis gasifier is communicated with the fuel gas oxygen replenishment premixing and filtering chamber; the tail gas treatment device is communicated with the top of the dechloridation and desulfurization drying device. When the method and the device are used for treating solid waste, the content of Dioxin in a detected emitted tail gas is lower than 0.023ng/m<3>, and the emission allowances of other gases, such as CO, SO2, HC1 and NOx, are also highly superior to the emission standard (GB18485-2014) issued by the nation in July 1st, 2014, and can completely meet the requirement of environment-friendliness.

The invention discloses a wet-type purification treatment method and device for flue gas of a domestic garbage incineration power plant. An ammonia water quenching device, a power spray activated carbon device and a bag-type dust collector are sequentially connected through air ducts, the air inlet end of the ammonia water quenching device can be connected with the flue gas outlet end of the domestic garbage incineration power plant, and a compressed air system is further connected to the air duct between the ammonia water quenching device and the power spray activated carbon device; a compressed air system is arranged below a dust hopper of the bag-type dust collector, the dust hopper is connected with a flying dust bin through a pipeline, an outlet flue of the bag-type dust collector is connected with a washing and concentration section of a wet-type deacidifying tower through a pipeline, and the wet-type deacidifying tower comprises an absorption section, the washing and concentration section and an oxidizing section; spray nozzles capable of spraying ammonia water are arranged in the absorption section of the wet-type deacidifying tower, a flue gas exhaust pipeline of the wet-type deacidifying tower is connected with defogging equipment, the oxidizing section of the wet-type deacidifying tower is connected with an oxidation air blower, and an ammonia chloride and ammonia sulfate outlet of the oxidizing section of the wet-type deacidifying tower is connected with crystallizing equipment.

The invention discloses an ozone low-temperature oxidation denitration system which comprises a flue, an ozone generator and a washing tower. The ozone low-temperature oxidation denitration system is characterized in that an ozone distributor is mounted in the flue; the ozone is supplied to an ozone channel of the ozone distributor through a pipeline at an outlet of the ozone generator; the ozone is jetted into the flue by the ozone distributor; the outlet of the flue is connected with the washing tower; the mixture of the ozone and exhaust gas in the flue enters into the washing tower. Compared with the prior art, the ozone low-temperature oxidation denitration system has the beneficial effects that the investment and running cost is lower than that of SCR (Selective Catalytic Reduction) technology; NOx removal rate is high and can reach 95% or more; the technique is simple, the expandability is excellent and the technological operation is simple, stable and reliable; the adaptation of the technical condition is wide; operation at low temperature is carried out and no high-temperature window is required; the system is free from ammonia escape secondary pollution and ammonium sulfate corrosion. The invention also discloses an ozone low-temperature oxidation denitration technology.

The invention relates to a storage-type super-low nitric oxide system in a coal fired boiler coal mill. On the basis of the existing low-nitrogen burning technology, the superfine coal powder preparation technology and the smoke circulating technology are adopted. The smoke circulating technology adopts cold furnace smoke to be mixed with primary air to be supercharged by a primary fan, the heating and powder feeding technology of an air preheater and the hot air and high-temperature furnace smoke drying technology of the powder production system are adopted, i.e. superfine coal powder can be prepared, the hot furnace smoke enters a primary air large air bellow, the hot furnace smoke is mixed with superfine coal powder prepared by a superfine coal powder preparation device in a coal powder blender and supplied by a powder supply machine from a coal powder cabin to be heated, and the air-powder mixture is fed into a low-nitrogen burner through a primary air pipe. In the main burning area of the boiler, since the air content of the furnace smoke is little, a lower residual air coefficient can be realized, the emission of the nitric oxide can be reduced.

A gas or oil boiler working in thin-flameless combustion mode is disclosed. The outlets of the air delivering tub and the primary fuel tube in said air delivering tube are surrounded by a pre-burning hood. Several cyclone tubes are arranged from said pre-burning hood to combustion box. Several secondary fuel tubes have their inlets connected via fuel flow controller to fuel supplying tube and their outlets extended in combustion box. The thin combustion takes place in said pre-burning hood and the flameless combustion is formed in the combustion box.

A method for removing ammonia nitrogen, nitrogen nitrate and nitrogen nitrite in water synchronously. The invention relates to a method for removing ammonia nitrogen, nitrogen nitrate and nitrogen nitrite in water synchronously. Through the invention, the technical problems that nitrogen in three forms can not be removed synchronously through the existing method removing ammonia nitrogen, nitrogen nitrate and nitrogen nitrite in water and the existing method is complex in operation and can produce a secondary pollution thus can not be utilized in drinking water treatment are solved. In the invention, water needing to be treated is subjected to a PH adjusting process and a dissolved oxygen control process, and then is radiated by ultraviolet light with a wavelength in the range of 150 to 260 nm. The method can remove ammonia nitrogen, nitrogen nitrate and nitrogen nitrite synchronously without multistage removal, expensive oxidizing agents and catalysts, no secondary pollution and no subsequent process, and show the characteristics of safety, convenience, economy and high efficiency while removing nitrogen in three forms. Therefore, the method can be utilized for treatments of underground water, drinking water, water discharged from sewage treatment plants, industrial water and domestic water, and the remediation of natural water body.

The invention relates to a high-temperature steel slag bottom blowing air cooling crushing waste heat recovery device and method. A crushing bed is adopted as a high-temperature steel slag treatment carrier, a crusher is adopted for efficiently crushing steel slag, meanwhile, cold air is introduced into a bottom blowing air cooling box to solidify and cool the high-temperature steel slag, and meanwhile, the crusher rotates at a certain speed, moves forwards and backwards and rotates to crush the steel slag. A heat exchanger and a generator are adopted for cooling the high-temperature steel slag to generate high-temperature waste heat for recovery and power generation. The crushing capacity is high, the steel slag treatment efficiency is greatly improved, and meanwhile, waste heat recoveryand power generation can be realized by adopting air cooling heat exchange. Efficient crushing and waste heat recovery of the high-temperature steel slag are realized, a steel slag water cooling system device is omitted, a simple dry dust removal mode is adopted to replace a wet flue gas treatment system caused by a previous water cooling process, the advantages of being high in automation degree,small in space occupation, good in leakproofness, low in system investment, capable of achieving ultra-clean emission and the like are achieved, and the comprehensive economic benefits of steel slagtreatment are improved.

The invention discloses a device for evaluating the automobile exhaust degradation effect of an OGFC mixture. The device comprises a closed container, an automobile engine, an automobile exhaust analyzer, a track board test piece, and air supplying devices, wherein the air supplying devices are arranged in the closed container. The invention further discloses an evaluation method which comprises the following steps in sequence: preparing the track board test piece, and generating automobile exhaust; simulating the degradation of automobile exhaust on a pavement and testing the concentration of each gas in the automobile exhaust; processing data. The track board test piece is prepared from the OGFC mixture which is added with a photocatalytic material; the evaluation index, used for evaluating the automobile exhaust degradation effect, of the OGFC mixture is taken as the degradation rate. The evaluation device can simulate the automobile exhaust degradation processes of the OGFC mixture in different illumination conditions by controlling the number of ultraviolet lamp tubes. The evaluation method is accurate and reliable, and coincides with the automobile exhaust degradation situation on a real pavement.

The invention discloses a liquid sulphur collecting method suitable for a sulfur recovery device. Process gas of the sulphur recovery device enters a process gas condensate cooler to carry out gas-liquid separation; condensed and separated gas enters the next stage of reaction or condensate cooling system after a liquid sulphur catcher traps the liquid sulphur; the condensed liquid sulphur is collected by a liquid sulphur collector below the process gas condensate cooler; the collecting process is controlled by a process operation module; the collected liquid sulphur is directly delivered to a sealed liquid sulphur middle tank with pressure; the liquid sulphur is fed to a liquid sulphur treatment system after passing through a liquid sulphur degassing pump after gas-liquid secondary separation; and the separate gas is separated from the final stage of process gas condensate cooler and enters a tail gas treatment unit together with the tail gas which is further separated by a tail gas delivery tank. By adopting the technology, arrangement of a sulphur sealing tank, a sulphur sealing tank pond and a liquid sulphur pond is concealed; the technologic process is shortened; the investment on the equipment is reduced; and pollution of the liquid sulphur, the hydrogen sulfide and related treatment technologies on the soil, environment and ground water quality is partially removed.

The invention discloses a low-temperature plasma waste water treatment device and method. The method comprises the following steps of: draining waste water into a reaction groove and putting into a low-temperature plasma environment, wherein the low-temperature plasma environment is provided by using a dielectric barrier discharge low-temperature plasma device; and arranging the discharging anodeof the dielectric barrier discharge low-temperature plasma device at a position 1.0-10.0 centimeters away from a waste water level plane, charging waste water at the power/cm<2> 1.0-5.0 watts, and treating the waste water for at least more than 5 minutes. Waste water is treated at the depth of 5.0-10.0 centimeters, so that the discharging concentration of pollutants containing waste water is further lowered, and the discharging standard is increased; and the waste water treatment device has low replacement cost, and is suitable for large-scale investment.

The invention relates to a brown air integrated solid waste incinerator, which lifts the solid waste via the feeding belt machine (11) to the waste feeding inlet (12) into the burning room (6); then fires the burning machine (5) while the generated smoke is fed into the secondary burning room (8); then fires the oil ejector (7) which can burn the air, brown air or the mixture between air and brown air; the burnt smoke will be fed into gas-gas heat exchanger (9); and discharges the tail gas. The invention has the characterized in that fully burning, less CO discharge as 5mg/NM3 which is less than national discharge standard, simplified process, reduced device, saved cost and the application for integrating incinerate system.

The invention discloses a power station boiler smoke waste heat deep recycling and emission reducing system. A first low-temperature heat exchanger is arranged between an air pre-heater and a dust remover, a second low-temperature heat exchanger is arranged between a pressurizing fan and a desulfurizing tower, an air heat exchanger is arranged between a secondary fan and the air pre-heater, a heat exchanging medium output end of the air heat exchanger is connected with a heat exchanging medium input end of the second low-temperature heat exchanger through a first water pump, a heat exchanging medium output end of the second low-temperature heat exchanger is connected with a heat exchanging medium input end of the first low-temperature heat exchanger, and a heat exchanging medium output end of the first low-temperature heat exchanger is connected with a heat exchanging medium input end of the air heat exchanger. According to the power station boiler smoke waste heat deep recycling and emission reducing system, the defect existing in waste heat recycle of traditional low-temperature economizers is overcome, smoke temperatures can be deeply reduced, smoke temperature distribution is optimized, and the purposes of deeply recycling smoke waste heat and reducing dust discharge concentration are achieved.